What is the sum of 30 and 20?

(a)  

Write MMX in Arabic numerals.

(a)  

5 girls, how many eyes?

(a)  

Write two thousand three hundred fifteen in digits.

(a)  

Reduce 100 by 100

(a)  

How many days are in 2weeks?

(a)  

Increase 10 by 25

(a)  

Start with2, add 5 then subtract 3.

(a)  

214 in expanded notation will be?

(a)